NumberResearch Membership · Data 2026-04

Recent prefix assignments

380 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 2026-04

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.

Most active assignees, last 30 days
8X8, INC. 38
ONVOY, LLC - CA 37
NEW CINGULAR WIRELESS PCS, LLC - IL 33
NEW CINGULAR WIRELESS PCS, LLC - DC 30
ONVOY, LLC - TX 18
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXAssigneeOCNRate centerState
206-426 ONVOY, LLC - WA 483E SEATTLE WA
206-427 NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
206-428 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
206-429 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DES MOINES WA
206-431 QWEST CORPORATION 9638 SEATTLE WA
206-433 QWEST CORPORATION 9638 SEATTLE WA
206-436 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
206-437 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
206-438 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
206-439 QWEST CORPORATION 9638 SEATTLE WA
206-440 QWEST CORPORATION 9638 SEATTLE WA
206-441 QWEST CORPORATION 9638 SEATTLE WA
206-442 QWEST CORPORATION 9638 SEATTLE WA
206-443 QWEST CORPORATION 9638 SEATTLE WA
206-444 QWEST CORPORATION 9638 SEATTLE WA
206-445 ONVOY, LLC - WA 483E SEATTLE WA
206-447 QWEST CORPORATION 9638 SEATTLE WA
206-448 QWEST CORPORATION 9638 SEATTLE WA
206-449 QWEST CORPORATION 9638 SEATTLE WA
206-450 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
206-456 LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
206-457 NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
206-459 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
206-461 QWEST CORPORATION 9638 SEATTLE WA
206-462 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
206-463 CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 VASHON WA
206-464 QWEST CORPORATION 9638 SEATTLE WA
206-465 NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
206-466 T-MOBILE USA, INC. 6529 SEATTLE WA
206-467 QWEST CORPORATION 9638 SEATTLE WA
206-469 QWEST CORPORATION 9638 SEATTLE WA
206-470 QWEST CORPORATION 9638 SEATTLE WA
206-478 METROPCS, INC. 5562 SEATTLE WA
206-479 ONVOY, LLC - WA 483E SEATTLE WA
206-484 NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
206-490 QWEST CORPORATION 9638 SEATTLE WA
206-491 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
206-493 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SEATTLE WA
206-494 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
206-495 ONVOY, LLC - WA 483E SEATTLE WA
206-496 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
206-498 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
206-499 NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
206-500 QWEST CORPORATION 9638 SEATTLE WA
206-501 T-MOBILE USA, INC. 6529 SEATTLE WA
206-504 QWEST CORPORATION 9638 SEATTLE WA
206-506 QWEST CORPORATION 9638 SEATTLE WA
206-508 LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
206-509 QWEST CORPORATION 9638 SEATTLE WA
206-510 METROPCS, INC. 5562 SEATTLE WA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 2026-04 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.